SOLUTION: If the population standard deviation is o = 8, how large a sample is necessary to have a standard error that is:
a) less than 4 points?
b) less than 2 points?
c) less than 1 poi
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-> SOLUTION: If the population standard deviation is o = 8, how large a sample is necessary to have a standard error that is:
a) less than 4 points?
b) less than 2 points?
c) less than 1 poi
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Question 408527: If the population standard deviation is o = 8, how large a sample is necessary to have a standard error that is:
a) less than 4 points?
b) less than 2 points?
c) less than 1 point?
You can put this solution on YOUR website! If the population standard deviation is sigma = 8, how large a sample is necessary to have a standard error that is:
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Standard error = s/sqrt(n)
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a) less than 4 points?
Solve 8/sqrt(n) < 4
2/sqrt(n) < 1
2 < sqrt(n)
n > 4
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b) less than 2 points?
Solve 8/sqrt(n) < 2
4/sqrt(n)< 1
squrt(n) > 4
n > 16
--------------------
c) less than 1 point?
8/sqrt(n) < 1
8 < sqrt(n)
n > 64
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Cheers,
Stan H.
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